19864673552 has 20 divisors (see below), whose sum is σ = 38490173376. Its totient is φ = 9931725600.

The previous prime is 19864673537. The next prime is 19864673567. The reversal of 19864673552 is 25537646891.

It is an interprime number because it is at equal distance from previous prime (19864673537) and next prime (19864673567).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348677 + ... + 401627.

Almost surely, 2^19864673552 is an apocalyptic number.

It is an amenable number.

19864673552 is a deficient number, since it is larger than the sum of its proper divisors (18625499824).

19864673552 is a wasteful number, since it uses less digits than its factorization.

19864673552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76406 (or 76400 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The spelling of 19864673552 in words is "nineteen billion, eight hundred sixty-four million, six hundred seventy-three thousand, five hundred fifty-two".